The Renogy Adaptor Kit is a set of two wires designed specifically for connecting a Renogy solar panel to a charge controller. The Adaptor Kit includes MC4 connectors on one end for effortless connection to the solar panel, and exposed wire on the other end to lead directly into the charge controller. This wiring kit is essential for off-grid solar installations, roof or ground level, and is offered in a wide range of sizes. The wiring is weatherproof and designed to withstand extreme heat and cold. This wiring kit is ideal for Renogy Off-Grid Kits ranging from 100W to 400W.